Electric cut-out.



T. E. MURRAY.

ELECTRIC GUT-OUT.

APPLICATION FILED JUNE a, 1913.

11,103,989. Patented July 21, 1914 um 1 i m wie.. i m..

UNITED sTATEs PATENT oEEIoE.

THOMAS E MUBRAY, 0F YQB/K, N. Y.,

ELEcTErc GUT-OUT.

To allwhom t may/concern L' Be it known that I, THOMAS E. MURRAY, a citizen of the United States, residing at New York, in thecounty of New York and.,r

State-of New York, have invented a certain new andvuseful Improvement in Electric Cut-Guts, ofwhich the following is a specification, p'

The.invention .isan electric cut-out designedfor useJ in al three-wire system, comprisinga switch leven'movable into two positions, ancl.fi 1sescarried on said lever cooperating with contact-son v.said block; the construction being such that when said level` is in,onev position, circuit is closed in the positive and the` neutral conductors of a three-wire system by fuses introduced into both of said conductors, and when thelever is in the opposite position, circuit is closed in the negative and the neutral conductors vof said system by fuses introduced into both of `said conductors. l, v

Thev invention'further consists in the con struction more particularly hereinafter pointed out.

In the accompanying drawings-l1`igure 1 is a side elevation of my device. Fig. 2 is a plan View, the switch lever shield being in section on the line a3 of Fig. 1. Fig. 3 is a longitudinal section on the line y, g/ of Fig. 2.

Similar numbers and letters of reference indicate like parts.

The connections as here represented adapt the device for use on a three-wire circuit.

The base block 1, of refractory insulating material, has two longitudinal channels 2, 3 on its upper side. On the lower side of said block and disposed transversely to channels 2, 3 are three bus-bars 4, 5, 6, separated by layers of insulation. Seated also on the lower side of block 1 are three bar conductors 7 8, 9, connected as follows: Conductor 7 crosses and is in contact with bus-bar il, and has an offset 10 which extends up through an opening in the base block into channel 3, where it forms one member of a pair of contacts, the other member of said pair being the plate 11., to which circuit wire 12 .is secured. Conductor 8 crosses and is in contact with bus-bar 6, and has an oset 13 whichextends up through au opening in the block at the otl'ufr end of channel 3, where it forms one member of a pair of contacts, the other member of said pair being the plate 14, to which the circuit wire A Specification of Letters Patent.

Application led .Tune 9, 1913. i Serial No. 772,528.Y

Patented July 21, 19.14.

15 is attached. Conductor 9 crossesand isV 4may be' the positive lead ofa three wire system, wire 15, the negative lead, and the wires 20 parallel terminals of the neutral lead the bus-bars 4, 6 and 5 being respec` tively positive, negative und neutral A swinging fusejcarrying switch A is provided, conipiising ,a ii anglefpiece B, secured to which are twopairsmof arms, C C and D D. The ari'nS C .C are at right angles to the arms D D, Secured tothe ends of the angle-piece B are'sector-shaped side plates E which, together with the'curved plate F,

which p, may be integral .with them, form a shield. On the block are lugs G, in which saidjshield is pivot'ed, and'may be swung` in either direction, as shown in Figs. 1 and 3. The arms C C and D D are slit at their ends, so that each arm may enter and fit snugly in an opening in a carrier H of insulating material, over the edge of which the fuse strip l is doubled. The four carriers H and fuse strips thereon are alike. Each fuse strip extends over the body portion of its carrier on opposite sides thereof and is secured in place, The switch lever is swung by the handle K on the shield. When said lever is in the position shown in Fig. 3, one fuse is introduced between the pair of contacts formed by offset 13 and plate 111, and the other fuse is introduced between the pair of contacts formed by oil"- set 17 and plate 19. Circuit is then closed from negative bus-bar 6 through the fuse inserted between contacts 13, 14 to negative lead 15, and simultaneously from neutral bus-bar 5 through the fuse inserted between contacts 17, 19 to neutral lead 20. Vhen said lever is swung into the position shown in Fig. 1, one fuse is introduced between the pair of contacts formed by offset 10 and plate 11, and the other fuse is introduced between the pair of contacts formed b olfset 16 and plate 18. Circuit isthen closed from positive bus-bar 4t through the fuse inserted between contacts 10, 11 to positive lead 12, and simultaneously from neutral bus-bar 5 through the fuse inserted be- ,tween contacts 16, 18 to neutral lead 20.

lll

In this way by placinwthel switchle'ver in one position or the other, circuit is closed and fused through either the positive and lneutral or the negative and neutral con-` ductors of the system. s

Iclaiin: '-f l.

l. A base, a group of two Apairs of 'contacts on said base, the pairs of said group being inter osed respectively inthe positive and neutra conductors ofv a three-wlre system, a secondgrou'p oftwo pairs of contacts on said base, `the pairs of said second group being interposedrespectively in the negative and neutralconduetors ofsaid system, a switch lever pivoted to said base between said groups and having two parallel arms on each side ofit's p ivot,'"and fuse plugs carried -onzsaid arms and. adapted to enter and close fcircuit between themembers of said pairs of contacts, the arms on one side of said lever being'setvat an angle to the arms onv the other side; whereby when said lever is swung' in one direction, the rfuses on two osaid arms shall enter between and close 'circuit'vink the pairs' 'olflcontacts interposedy in said positiveand neutral conductors, and whensaid 'lever is swung in the opposite direction, tlieuses 'on tbe'other two of said arms vshall enter 'between 'and close circuit in the pairs of contacts interposed in said negative and neutral conductors.

2. A base, three mutually insulated busbars extending across said base, two pairs of contacts on said base, each pair having one member connected to one of said busbars, circuit terminals connected to the opposite members of said pairs, a pair of contacts on said base, each having one member connected to one of the other bus-bars, two circuit terminals connected to the opposite members of said pairs, the said four pairs of contacts being arranged in two groups of two pairs each, each group including one of the two pairs of contacts connected to the same bus-bar, a shaft journaled on said base and extending across the same between said groups, two pairs of arms on said shaft, one pair of arms being placed at an angle to the other pair, and fuse plu s carried tby 'said arms and coperating wit Asaid pairs of contacts.

ln testimony whereof I have affixed my signature in presence of two witnesses.

THOMAS E. MURRAY. Witnesses GERTRUDn T. PORTER, MAY T. MCGARRY.

Copies. cf this patent be obtained for 've cents each, by addressing the Commissioner of Patents,

` Washington, D. C. 

